Compressor unit



y 1934- J. A. FAASCHE ,958,065

COMPRESSOR UNIT Filed Aug. 15, 1930 Rum/7165": Jms J Pan/5 07210,

Patented May 3, 9 r V UMTED STATES PATENTJAOFFICE 1,958,065 ooMrnsssoamvrr Jens a. 'Paasche, Wilmette, 111. Application Au ustin isaasrini'no. 415.460 scams. (01. 230-58) The invention relates generally tocompressing Fig. 4 is a modified form of unit showing a mechanism forgaseous fluids and moreparticusilencer employed as a handle on a-sma1lcomlarly to compressors of relatively small size and pressor unit. 7weight capable of being carried or otherwise In disclosing the presentinvention I have transported from place to place. chosen, forillustrative purposes, to show the tea- 60 An object of the invention isto provide a novel tures thereof as being embodied in an organizaunitfor creating and supplying compressed gas tion especially adapted foruse in connection which is complete in itself, is relatively light inwith an apparatus for applying paint or color by weight, and compact inarrangement of parts air-brush or similar pressure-painting or sprayloand which is capable of providing a clean. dry ing device. .It will, ofcourse, be readily apparent 55 and cool supply of gas, such as air,under presto one skilled in the art that many features 0! sure. I theinvention are also applicable to uses other Another object of theinvention is to provide an than in this particular adaptation. improvedunit for producing cool, dry gas under Referring particularly to thedrawing, 10 pressure which unit includes a means. for 'comdesignatesgenerally a a u -fl -c p pressing the gas, means for separating water,oil m h n m of y w l -known type and congnd other fm-eign matter fromthe compressed StlllCtiOl'l. That SllOWl'l herein I01 illustration isgas, and a. conduit connecting said mean ra rotary air compressor 11which is driven at a ranged to cool the gas passing therethrough. highsp d y a m t r said m t r and c mes in the operation of gaseous fluidcompressors, p ss r being pr f a ly combined. as shown. it is well-knownthat a large amount of heat into a unitary Structure T r u h u t 0 iscreated by the compression of the gas, which lowing description the$81!!! W be generh i tr n itt d to th machin as h l ally understood to,be indicative of 'air or other Consequently, after such machines havebeen in Suitable-compressible fl T C p s o operation only a short lengthof time they become chides a head 3 having an n t '1 a d an out- 80 veryhot and cannot be touched by the bare hand. 5 through wh h a is d awn ta d je t d A further bj t of th r s t invention i from the compressor.The constructional dcto provide, in a mechanism of this character, tailsof compressor form -P t Of t e new and improved means for moving the m hpresent invention and, will not, therefore, be

m'sm about, which means is automatically maingiven, it being deemedsufficient to y that t e 85 v 45 that of the rest of the assembly.

tained at a low'temperature by the operation of mpressor is of, suchsize and weight. as to D the mechanism. mit transportation. thereof fromplace to place.

More specifically stated, an object or the ine motor dmpr s ay be m untd vention resides in the provision of a t b l on means which facilitatestransportation theremember, which may be a silencer unit for elimof fromplace to p o t pu p se. th 90 inating noise incident'tothe operation ofcommotor casing has p f paced brackets 16 pressors, connected to theintakeside of the con- (only One Of which y be Seen in p dpressor andforming all or a part of a conduit ing from oneside thereof. .Eachbracket mounts through which the gas passes to the compress a suitableroller element 17,- such as a pivoted 40 said tubular member beingfashioned as ahandle At the pp s t nd f the unit, the 96 for the graspof an operator so th t t flow of compressor has a bracket 18 securedthereto gas therethrough automatically maintains the which also carriesa pivoted caster 19 or similar temperature of the handle at aarelativelylow andelement- The roller l ments 17 and 19 occupy constant oint whichis substantially less than positions conforming to t p s of a t ang e tosupport the unit. I H

,Other objects and advantages will be apparent e means y V wh w t r andother in the following description and from theacc'omdeleteriousioreignmatter are removed from the panying drawing, inwhich: I compressed gas may be of any well-known con- Figure Us a sideelevation of a unit embodying struction The separator which is shownherein the featuresof the present invention. is. designated ge y v20findv Comprises (S e 105 Fig. 2 is a longitudinal central section on anFig. an elongated tubula a ing 21 having enlarged scale of the oil andwater separator near its lower en m sverse, foraminous partiassembly. 1r tion or wall 22 dividing the casing into a large Fig. 3 is alongitudinal central section on an uppe compartment and a smell lowermpartenlarged scale of the air-cooled silencer handle. merit. The upp rc mpartment is filled with 110 closely packed material, such as thediagrammatically indicated brass coils 23, by which a separation of oiland water duced.

The ends of the casing'are closed by upper and lower heads, designated24 and 24 respectively. The lower head 24' preferably has a petcock 24thereon through which the accumulation of the separated oil and watermay be drained. The upper head 24 is tapped to receive a suitable inletfitting 25 to which a'pressure gauge 26 of customary design may beconnected. The fitting 25 within the casing communicates with a shortforaminous member 27 through which gas passes into the upper chamber.Subsequently, the gas flows downwardly of the chamber and passes throughthe foraminous partition 22.

From the lower chamber the gas is conducted to the head 24 by alongitudinal duct 28 which extends from the lower chamber to an outletport 29 in the head. If desired, a screen 30 or like member may bedisposed about the open end of the duct 28. Any preferred type of nipple31- (Fig. 1) and conduit 31 may be connected with the port 29 forconveying the cleaned gas from the unit.

The separator 20 is mounted rigidly in any suitable manner, on aprojecting shelf 32 (Fig. 1) preferably formed as a part of the bracket18,

whereby the separator is positioned adjacent to' the compressor.

As is well known, the application of pressiu'e the instant unit forcooling the gas to a proper temperature. In one form, this meanscomprises a conduit 33 in the shape of a helical coil arranged insurrounding relation to the separator. The conduit is preferably formedof a metal, such as copper, which is a good conductor of heat. One endof the coil is connected to the outlet 15 from the compressor, and theother end has a straight extension 33* which communicates with the inletfitting 25. This arrangement is com-' pact and in operation is, verysatisfactory. The hot gas from the compressor flows to the separatorthrough the coil 33 thereby reducing the temperature of the gas to asuitable point before it reaches the separator.

Incidental to the operation of a gas compressor is an undesirableheating of the compressor parts which makes the unit difiicult to handleduring the operation thereof. The present invention provides a handle 34for moving the compressor from place to place which is arranged to beautomatically cooled by the flow of relatively cool air to the intake14. To this end, the handle is in the form of a tubular casing whichcommunicates at one end with the intake to the compressor. The other endof the tubular casing is open to atmosphere in the present instance but,of course, may be connected in any suitable manner with a source of gasto be compressed. Preferably, the intermediate portion of the handle isof a size convenient to be grasped and, while it is not necessary, it isadvantageous if this portion be positioned substantially above thecenter of gravity of the compressor.

Compressors of the type illustrated, which operate at a high rate ofspeed, produce, as an incident to their operation, a shrill noise whichis from the gasis pro-- 1,ose,oes

quite objectionable. I have, therefore, embodied in the tubular casing ameans (which may be termed a silencer) for absorbing or muiiling thenoise. A suitable means for this purpose comprises (see'Fig. 3) aplurality of sleeves 35 and 36 of different diameters mounted within thetubular handle. The sleeves are concentric withrespect to each other andto the tubular member and define therebetween gas passageways 37 and 38.Helical partitions 39 and 40 in the passageways 38 and 37, respectively,define elongated spiral paths along which the gas must flow in order topass from one end to the other of the tubular member. This circuitouspath serves to baiiie and absorb the noise produced with only slightfrictional resistance to the free fiow of air to the compressor, therebyrendering the operation of the compressor silent and unobiectionable.

In the operation of the unit, gas passing to the compressor is drawnthrough the tubular casing 34 connected to the intake passageway. Thisgas will ordinarily be at room temperature and will always be at a muchlower temperature than that of the compressor. Consequently, the bandlewill automatically be maintained at a relatively low temperature. Thisis more especially true where the silencer-handle is employed since alarge surface area is exposed to the cooling action of the inflowingfluid.

In Fig. 4 a handle of this character is shown as applied to a smallcompressor unit 41 adapted to be carried from place to place in theoperators hand. In this modified form, the intake 42 for the compressoris located at one end of the unit. Hence, the tubular casing comprisingthe handle is bent, as at 43, to extend over the body of the compressor.A second silencer means 44 may be attached to the outlet passageway 45to form a part of the conduit 48 leading from the compressor to producea still more quietly operating machine. Since the compressed gas passestherethrough in a highly heated condition, the

silencer 44 preferably occupies an out-of-theby the fiow of fluid to themechanism and at the same time embodies a silencing means for absorbingthe noise of operation of said mechanism.

I claim as my invention:

1. A unit for producing compressed gas comprising, in combination, aunitary gas'compressor and a motor for driving said compressor, saidcompressor having an inlet and an outlet for gas, brackets connected tosaid motor having roller elements mounted thereon, another bracketcarried by said compressor and having a roller element thereon, saidroller elements being mounted for pivotal movement to facilitatetransportation of the unit, an oil and water separator, a platformcarried by said last mentioned bracket for supporting said separator ina position adjacent said compressor, and a helically coiled coolingconduit surrounding said separator and connecting said compressor outletwith said separator for cooling the compressed gas during the passagethereof from the compressor to the separator.

2. A compressing machine capable of operat-' gas to be compressed flowsto the mechanism, and a tubular unit rigidly connected to said inlet forconducting gas thereto and including means for quieting noise incidentto the operation of the ing said fluid to said machine including atubular member connected to the intake side ot'the machine, said memberbeing fashioned to be grasped by an operator to transport the machinefrom one point to another, thereby providing a mechanism, said unitbeing formed as a handle 30 handle the temperature of which ismaintained for the assembly which is maintained at a lower a at arelatively low and constant point by the flow temperature than that ofthe mechanism by the of fluid therethrough. flow of gas therethrough.

3. The combination of a gas-compressing JENS A. PAASCHE. mechanismhaving an inlet thereto through which 3% CERTIFICATE OF CORRECTION.

atent No 1,958,065. May 8, 1934.

JENS AQPAASGHE.

It is hereby certified that error appears in'the printed specificationof the above numbered patent requlrmg correction as follows: Page 3,line 2, claim 2, stgike out the words the intake side of" and insertsame before 'said" seitignthoccurrence in line l; and that the andLetters Patent should be read w l8 correction therein that the same mayconform to the record of the case in the Patent Office.

Signed and sealed this 19th day of June, A. D. 1934.

Bryan M. Battey (Seal) Acting Commissioner of Patentsv

